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Indoor visible light positioning method and system based on a single image sensor

An image sensor and positioning method technology, applied in the field of visible light communication, can solve the problems of increased hardware cost, difficulty and complexity in accurate angle measurement, and achieve the effects of avoiding positioning errors, expanding application fields, and simplifying structures

Active Publication Date: 2020-02-11
BAISE UNIV
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Problems solved by technology

[0004] Since the indoor positioning method based on image sensor imaging needs to accurately measure the angle, it is much more complicated than the common indoor positioning method of visible light signal strength, and it is difficult to accurately measure the angle, and the use of more than two image sensors will increase the hardware cost, it will also bring problems such as positioning system stability and reliability

Method used

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  • Indoor visible light positioning method and system based on a single image sensor
  • Indoor visible light positioning method and system based on a single image sensor
  • Indoor visible light positioning method and system based on a single image sensor

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Embodiment

[0040] 1. Light source planning

[0041] The geometric measurement method and the imaging method need to measure the distance and the angle of the emitted light. In the indoor environment, the accuracy and stability of the positioning will be affected by the signal multipath reflection, the fluctuation of the luminous intensity, and the occlusion of the signal light, and the reflected light has the greatest impact. . In particular, the positioning system using the signal strength (RSS) ranging method is more significantly interfered by reflected light.

[0042] The present invention starts from the main factors that generate reflected light, and adopts two methods to suppress the interference of reflected light: LED lighting source distribution and light source emission angle optimization design; receiver receiving field angle optimization design.

[0043] Indoor LED lighting source press attached figure 1 The way of distribution on the ceiling plane, the light source distri...

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Abstract

The invention relates to a visible light positioning method and system, especially to an indoor visible light positioning method and system based on a single image sensor, and belongs to the technical field of visible light communication. The single image sensor receives signals, and a receiver is simple in structure; it is not required to measure an angle value of a light beam, positioning errors caused by relatively low angle measuring precision can be avoided, and extra problems of system complexity caused by use of angle measuring devices are reduced; range finding is not needed, and the problem of relatively low range finding precision, which is one of main problems in improving the indoor positioning precision at present, caused by different factors in the range finding process is avoided; and the structure of a positioning system is simplified greatly, the positioning precision of the system is improved greatly, high-precision 3D positioning within the cm precision magnitude can be realized, and the application field of the positioning system is broadened greatly.

Description

technical field [0001] The invention relates to a visible light positioning method and system, belonging to the technical field of visible light communication, and in particular to an indoor visible light positioning method and system based on a single image sensor. Background technique [0002] Visible light communication positioning technology based on LED green lighting source has outstanding advantages such as wide indoor coverage, energy saving, safety, simple layout, low cost, and good electromagnetic compatibility. The current positioning methods mainly include indoor positioning methods based on visible light signal strength, indoor positioning methods based on code division multiple access, indoor positioning methods based on frequency division multiple access, visible light multi-receiving point geometric center positioning methods, image sensor imaging based In addition to the indoor positioning method, there is also a positioning method that combines different in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/16
CPCG01S5/16
Inventor 卢洪斌
Owner BAISE UNIV
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